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/* Copyright (C) 2013-2014 Open Information Security Foundation
*
* You can copy, redistribute or modify this Program under the terms of
* the GNU General Public License version 2 as published by the Free
* Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
/**
* \file
*
* \author Anoop Saldanha <anoopsaldanha@gmail.com>
* \author Ken Steele <suricata@tilera.com>
*
*/
#ifndef __UTIL_MPM_AC_TILE__H__
#define __UTIL_MPM_AC_TILE__H__
typedef struct SCACTilePattern_ {
/* length of the pattern */
uint16_t len;
/* flags decribing the pattern */
uint8_t flags;
/* holds the original pattern that was added */
uint8_t *original_pat;
/* case sensitive */
uint8_t *cs;
/* case INsensitive */
uint8_t *ci;
/* pattern id */
uint32_t id;
/* sid(s) for this pattern */
uint32_t sids_size;
SigIntId *sids;
struct SCACTilePattern_ *next;
} SCACTilePattern;
typedef struct SCACTilePatternList_ {
uint8_t *cs;
uint16_t patlen;
/* Pattern Id */
uint32_t pid;
/* sid(s) for this pattern */
uint32_t sids_size;
SigIntId *sids;
} SCACTilePatternList;
typedef struct SCACTileOutputTable_ {
/* list of pattern indexes */
MpmPatternIndex *patterns;
/* number of entries in pattern list */
uint32_t no_of_entries;
} SCACTileOutputTable;
struct SCACTileSearchCtx_;
/* Reordered for Tilera cache */
typedef struct SCACTileCtx_ {
/* Convert input character to matching alphabet */
uint8_t translate_table[256];
/* The all important memory hungry state_table.
* The size of each next-state is determined by bytes_per_state.
*/
void *state_table;
/* Specialized search function based on size of data in delta
* tables. The alphabet size determines address shifting and the
* number of states could make the next state could be 16 bits or
* 32 bits.
*/
uint32_t (*search)(struct SCACTileSearchCtx_ *ctx, struct MpmThreadCtx_ *,
PatternMatcherQueue *, uint8_t *, uint16_t);
/* Function to set the next state based on size of next state
* (bytes_per_state).
*/
void (*set_next_state)(struct SCACTileCtx_ *ctx, int state, int aa,
int new_state, int outputs);
/* List of patterns that match for this state. Indexed by State Number */
SCACTileOutputTable *output_table;
/* Indexed by MpmPatternIndex */
SCACTilePatternList *pattern_list;
/* hash used during ctx initialization */
SCACTilePattern **init_hash;
/* pattern arrays. We need this only during the goto table
creation phase */
SCACTilePattern **parray;
/* goto_table, failure table and output table. Needed to create
* state_table. Will be freed, once we have created the
* state_table */
int32_t (*goto_table)[256];
int32_t *failure_table;
/* Number of states used by ac-tile */
uint32_t state_count;
/* Number of states allocated for ac-tile. */
uint32_t allocated_state_count;
uint32_t alpha_hist[256];
/* Number of characters in the compressed alphabet. */
uint16_t alphabet_size;
/* Space used to store compressed alphabet is the next
* larger or equal power-of-2.
*/
uint16_t alphabet_storage;
/* How many bytes are used to store the next state. */
uint8_t bytes_per_state;
} SCACTileCtx;
/* Only the stuff used at search time. This
* structure is created after all the patterns are added.
*/
typedef struct SCACTileSearchCtx_ {
/* Specialized search function based on size of data in delta
* tables. The alphabet size determines address shifting and the
* number of states could make the next state could be 16 bits or
* 32 bits.
*/
uint32_t (*search)(struct SCACTileSearchCtx_ *ctx, struct MpmThreadCtx_ *,
PatternMatcherQueue *, uint8_t *, uint16_t);
/* Convert input character to matching alphabet */
uint8_t translate_table[256];
/* the all important memory hungry state_table */
void *state_table;
/* List of patterns that match for this state. Indexed by State Number */
SCACTileOutputTable *output_table;
SCACTilePatternList *pattern_list;
/* Number of bytes in the array of bits. One bit per pattern in this MPM. */
uint32_t mpm_bitarray_size;
/* MPM Creation data, only used at initialization. */
SCACTileCtx *init_ctx;
} SCACTileSearchCtx;
typedef struct SCACTileThreadCtx_ {
/* the total calls we make to the search function */
uint32_t total_calls;
/* the total patterns that we ended up matching against */
uint64_t total_matches;
} SCACTileThreadCtx;
void MpmACTileRegister(void);
#endif /* __UTIL_MPM_AC_TILE__H__ */
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